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3 phase DC brush-less motor for wind turbine  RSS feed

 
Posts: 99
Location: Ontario
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Hello, I am using a 3 phase brush-less dc motor for a home made wind turbine, and I have a question about what to use for a battery charger. The motor by itself will produce higher voltages than the average cheap charge controller can handle. The motor is designed to use 200 - 300 volts at very high speeds. I think that at average wind speeds around 10 to 20 kmph, it may produce anywhere from 12 to 200 volts. I could use high speed blades, with the motor as it is, to achieve high voltage low amperage, or rewire the motor to produce lower voltage and higher amps at lower speeds.

1) Should I rewire the motor to produce low voltage high amps, and run through a inexpensive 12 or 24 charger, or leave it as high voltage and use a Mppt charger rated for 200 - 300 input volts?


2) Also if anyone has used one of these washing machine motors before for a wind turbine, what did you use for a hub to attach blades to the axle/spindle of the axle, bearing, motor assembly?
 
Posts: 43
Location: Welland, Ontario, Canada
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Steve, Your description does not make sense. You either have a 3 phase AC motor or a DC motor. ( You can not have a 3 phase DC motor) Give me the motor nameplate data and I might be able to give you some suggestions.
 
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